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Analog Allstar Operation
By Stephen Gansky W3AAD
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Configuring an MTR3000 for Analog Allstar Operation By Stephen Gansky W3AAD |
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I had a UHF Range 1 radio so programming to the amateur frequencies was no problem. I used MotoTurbo CPS Version 15.5.
Unlike the MSF5000 or MTR2000, the software is very simple with few options. The only things I needed to program were:
My cable to the Sound FOB used the following pins/signals on the J7 DB25 connector:
The MTR3000 can't drive a speaker directly so I added an audio amplifier to the rear of a standard Motorola mobile speaker. It uses a standard 4-wire RJ-22 plug (narrow RJ-11, like a handset cable). A standard Maxtrac / GM / Radius mobile mike worked fine as a local microphone although I didn't have the function buttons available on the GMN6147B service microphone. See the MTR2000's Modular Connectors article for more details on the speaker and microphone.
Click on any photo below for a larger image.
The photo below shows the GPIO pin settings.
The photo below shows the base/repeater setting (check the "Disable Repeat Path" box to turn the station into a base station) and the Help screen that goes with that field.
The photo below shows the opening screen after CPS read the code plug from the radio.
The photo below shows how I added a small audio amplifier onto the back of a standard Motorola loudspeaker. These can be purchased on popular auction sites for as little as $2US.
The photo below shows the pin connections for the modular microphone and speaker jacks on the front of the station.
The photo below shows the typical wiring connections used to interface the MTR3000 via J7.
The Allstar Adapter:
The "sound card" (or sound FOB) I use is made by George WB3DZZ and can be found at technobygeorge.com. The ARA-1 Version 2 that I use has the additional audio amplifier chip to allow driving 600 ohm loads. There are also jumper blocks to allow for hardware USB inversion. See the photo below.
All of the Allstar info can be found at Hamvoip.org. Below is a screen shot of the Allstar main menu.
Here is a screen shot of the Simple USB Tune menu where all the levels, PTTs, etc. are set.
Contact Information:
The author can be contacted at: sgansky [ at ] me [ dot ] com.
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This page originally posted on 15-Jan-2021
Article text and photos © Copyright 2021 by Stephen Gansky W3AAD.
Hand-coded HTML and formatting by Robert W. Meister WA1MIK.
This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.